Weighing multipath display switching system

Abstract

The utility model relates to a weighing multi-path display switching system, which comprises a plurality of weighing devices, two of the plurality of weighing devices form a group, and a switching circuit is arranged between the two weighing devices and an upper computer. The switching circuit comprises an intermediate relay and a change-over switch, and a coil of the intermediate relay is connected with the change-over switch in series and connected with the power supply through the change-over switch to form a loop; a normally open contact and a normally closed contact of the intermediate relay are respectively connected in series with the output ends of the controllers of the two weighing devices, the other end of the normally open contact or the normally closed contact of the intermediate relay is connected with a data line, and the controllers are connected with an upper computer through the data line. According to the utility model, the two weighing devices are divided into one group and are electrically connected, the two weighing devices are connected with the upper computer through the switching circuit and the data line, and the plurality of weighing devices are respectively communicated with one upper computer through manual switching, so that the operation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing, in particular to a weighing multi-channel display switching system. Background Art

[0002] As production increases, in order to improve detection efficiency, weighing equipment is added to weigh materials. Existing weighing equipment includes a floor scale, a controller and a display module. The floor scale includes a weighing sensor, the output end of the weighing sensor is connected to the input end of the controller, the controller is connected to the display module, and the controller is also connected to a host computer. The detection data can be displayed and recorded on the host computer.

[0003] As the number of weighing devices increases, the number of host computers connected to them also increases, resulting in increased detection costs, and multiple host computers are inconvenient for staff to control.

[0004] In order to save testing costs and ensure testing efficiency, a device that can connect multiple weighing devices to a host computer is urgently needed. Summary of the invention

[0005] In order to solve the problem that multiple weighing devices cannot be connected to one host computer at the same time, the utility model proposes a weighing multi-channel display switching system, which divides two weighing devices into one group and electrically connects them, connects them to the host computer through a switching circuit and a data line, and realizes the connection of multiple weighing devices to one host computer through manual switching, thereby reducing the operation cost.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a weighing multi-channel display switching system, including a weighing device, the weighing device includes a floor scale, a controller and a display module, the floor scale includes a weighing sensor, the output end of the weighing sensor is connected to the input end of the controller, the controller is communicatively connected to the display module, the controller is also connected to a host computer, the number of weighing devices is multiple, the multiple weighing devices are grouped in two, and a switching circuit is provided between the two weighing devices and the host computer;

[0007] The switching circuit includes an intermediate relay and a conversion switch, the coil of the intermediate relay is connected in series with the conversion switch, and the coil of the intermediate relay is connected to the power supply through the conversion switch to form a loop;

[0008] The normally open contact and normally closed contact of the intermediate relay are respectively connected in series with the output ends of the controllers of the two weighing devices. The other end of the normally open contact or normally closed contact of the intermediate relay is connected with a data line, and the controller is connected to the host computer through the data line.

[0009] The input switching of two weighing devices in the same group is controlled by the intermediate relay and the conversion switch, so that multiple weighing devices can be connected to the host computer.

[0010] Furthermore, the conversion switch includes a two-position self-locking knob, and the two-position self-locking knob includes a normally open contact.

[0011] Furthermore, the output ends of the two controllers of the group of weighing devices are connected in parallel, and a communication module is also arranged between the two controllers and the data line. The communication module includes a USB interface and an RS232 interface, and the corresponding data line includes a USB line and an RS232 line.

[0012] Furthermore, the host computer is provided with a plurality of communication modules, and the communication modules include a USB interface and an RS232 interface.

[0013] Furthermore, the host computer is provided with a cabinet, and the switching circuit and the communication module are arranged in the cabinet;

[0014] A partition is arranged in the cabinet, and the partition divides the cabinet into an upper part and a lower part. A display window is opened in the upper part of the cabinet, and a host computer is arranged corresponding to the display window, and the host computer is fixed to the partition. A circular mounting hole is opened below the display window, and a conversion switch is arranged in the circular mounting hole.

[0015] Through the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model realizes the communication switching between multiple weighing devices and a host computer. Multiple weighing devices are grouped in two, and a switching circuit is provided between the two weighing devices and the host computer. The switching circuit includes an intermediate relay and a conversion switch. The coil of the intermediate relay is connected in series with the conversion switch, and the coil of the intermediate relay is connected to the power supply through the conversion switch to form a loop. The normally open contact and the normally closed contact of the intermediate relay are respectively connected in series with the output ends of the controllers of the two weighing devices. The other end of the normally open contact or the normally closed contact of the intermediate relay is connected to a data line, and the controller is connected to the host computer through the data line. One of the two weighing devices in a group communicates with the host computer when the coil of the intermediate relay is powered off, and the other communicates with the host computer when the coil of the intermediate relay is powered on. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the electrical schematic diagrams of a weighing multi-channel display switching system of the utility model;

[0018] Figure 2 This is the second electrical schematic diagram of a weighing multi-channel display switching system of the utility model;

[0019] Figure 3 This is the third electrical schematic diagram of a weighing multi-channel display switching system of the utility model;

[0020] Figure 4The utility model is a structural schematic diagram of a weighing multi-channel display switching system.

[0021] Figure numbers: 1 is weighing equipment, 2 is controller, 3 is display module, 4 is weighing sensor, 5 is intermediate relay, 6 is conversion switch, 7 is data line, 8 is host computer, 9 is communication module, 10 is cabinet, and 11 is partition. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0023] Example 1

[0024] like Figures 1 to 4 As shown, a weighing multi-channel display switching system includes a weighing device 1, the weighing device 1 includes a floor scale, a controller 2 and a display module 3, the floor scale includes a weighing sensor 4, the output end of the weighing sensor 4 is connected to the input end of the controller 2, the controller 2 is in communication connection with the display module 3, the controller 2 is also connected to a host computer 8, the number of weighing devices 1 is multiple, the multiple weighing devices 1 are grouped in two, and a switching circuit is provided between the two weighing devices 1 and the host computer 8;

[0025] The switching circuit includes an intermediate relay 5 and a conversion switch 6, wherein the coil of the intermediate relay 5 is connected in series with the conversion switch 6, and the coil of the intermediate relay 5 is connected to the power supply through the conversion switch 6 to form a loop;

[0026] The normally open contact and normally closed contact of the intermediate relay 5 are respectively connected in series with the output ends of the controller 2 of the two weighing devices 1 . The other end of the normally open contact or normally closed contact of the intermediate relay 5 is connected to a data line 7 , and the controller 2 is connected to a host computer 8 via the data line 7 .

[0027] Preferably, the conversion switch 6 includes a two-position self-locking knob, and the two-position self-locking knob includes a normally open contact.

[0028] Preferably, the output ends of the two controllers 2 of the group of weighing equipment 1 are connected in parallel, and a communication module 9 is also arranged between the two controllers 2 and the data line 7, the communication module 9 includes a USB interface and an RS232 interface, and the corresponding data line 7 includes a USB line and an RS232 line.

[0029] Preferably, the host computer 8 is provided with a plurality of communication modules 9, and the communication modules 9 include a USB interface and an RS232 interface.

[0030] Preferably, the host computer 8 is provided with a cabinet 10, and the switching circuit and the communication module 9 are provided in the cabinet 10;

[0031] A partition 11 is provided in the cabinet 10, and the partition 11 divides the cabinet 10 into an upper part and a lower part. A display window is provided in the upper part of the cabinet 10, and a host computer 8 is provided corresponding to the display window, and the host computer 8 is fixed to the partition 11. A circular mounting hole is provided below the display window, and a conversion switch 6 is provided in the circular mounting hole.

[0032] like Figures 1 to 3 In the present embodiment, the host computer 9 is a computer, the data line 7 is an RS232 line, and a plurality of RS232 interfaces are provided on the host computer 9. In the present embodiment, the number of weighing devices is 4, namely, 1#~4#, wherein 1# and 2# are a group, 3# and 4# are a group, and there are four controllers 2, which are AT89C52 single-chip microcomputers. There are three outgoing lines of the controller 2, the three outgoing lines of 1# are connected to the normally open contacts of the intermediate relay 5, and the three outgoing lines of 2# are connected to the normally closed contacts of the intermediate relay 5. The connection mode of 3# and 4# is the same as that of 1# and 2#, and will not be repeated. The coil of the intermediate relay 5 is connected to the conversion switch 6.

[0033] During operation, the normally open contact of the transfer switch 6 (S1) is opened, the coil of the intermediate relay 5 (KA1) loses power, the controller 2 of 2# is connected to the RS232 interface through the normally closed contact, and is connected to the host computer 9 through the RS232 line, and the detection data of 2# is uploaded to the host computer 9. Turn the transfer switch 6, the normally open contact of the transfer switch 6 is closed, the coil of the intermediate relay 5 is energized, the controller 2 of 1# is connected to the RS232 interface through the normally open contact, and is connected to the host computer 9 through the RS232 line, and the detection data of 1# is uploaded to the host computer 9.

[0034] The switching method of 3# and 4# is the same as that of 1# and 2# and will not be repeated here.

[0035] When 1# is working, 3# or 4# can upload the detection data at the same time as 1#. Similarly, when 2# is working, 3# or 4# can upload the detection data at the same time as 2#.

[0036] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A weighing multi-channel display switching system, comprising a weighing device (1), the weighing device (1) comprising a floor scale, a controller (2) and a display module (3), the floor scale comprising a weighing sensor (4), the output end of the weighing sensor (4) being connected to the input end of the controller (2), the controller (2) being communicatively connected to the display module (3), the controller (2) being further connected to a host computer (8), characterized in that: There are multiple weighing devices (1), and the multiple weighing devices (1) are grouped in two. A switching circuit is provided between the two weighing devices (1) and the host computer (8); The switching circuit comprises an intermediate relay (5) and a conversion switch (6), the coil of the intermediate relay (5) being connected in series with the conversion switch (6), and the coil of the intermediate relay (5) being connected to a power supply via the conversion switch (6) to form a loop; The normally open contact and the normally closed contact of the intermediate relay (5) are respectively connected in series with the output ends of the controllers (2) of the two weighing devices (1); the other end of the normally open contact or the normally closed contact of the intermediate relay (5) is connected to a data line (7); and the controller (2) is connected to a host computer (8) via the data line (7).

2. A weighing multi-channel display switching system according to claim 1, characterized in that: The conversion switch (6) comprises a two-position self-locking knob, and the two-position self-locking knob comprises a normally open contact.

3. A weighing multi-channel display switching system according to claim 1, characterized in that: The output ends of the two controllers (2) of the set of weighing devices (1) are connected in parallel, and a communication module (9) is further provided between the two controllers (2) and the data line (7). The communication module (9) includes a USB interface and an RS232 interface, and the corresponding data line (7) includes a USB line and an RS232 line.

4. A weighing multi-channel display switching system according to claim 1, characterized in that: The host computer (8) is provided with a plurality of communication modules (9), and the communication modules (9) include a USB interface and an RS232 interface.

5. A weighing multi-channel display switching system according to claim 4, characterized in that: The host computer (8) is provided with a cabinet (10), and the switching circuit and the communication module (9) are provided in the cabinet (10); A partition (11) is provided in the cabinet (10), the partition (11) dividing the cabinet (10) into an upper part and a lower part, a display window is provided in the upper part of the cabinet (10), a host computer (8) is provided corresponding to the display window, and the host computer (8) is fixed to the partition (11), a circular mounting hole is provided below the display window, and a conversion switch (6) is provided in the circular mounting hole.

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